Flour-bolt



(No Model.) 2 Sheets-Sheet 1.

J.KOELNER.

FLOUR BOLT.

N0;s2 o29. Patented.Aug.11,l885.

FIG.I-

Flexm' M 2 wen 752" (No Model.) 2 Sheets-Sheet 2.

J. KOELNER.

FLOUR BOLT. 0. 324,029. v Patented Aug. 11, 1885,

I FIE-LII- y 1 y I f 1* E ;I, E h 1) rgjz/eizjoz' UNITED TATES PATENT Erica.

JOHN KOELNER, OF TERRE HAUTE, INDIANA.

FLOUR-BOLT.

JPECIFIQATION forming part of Letters Patent No. 324,029, dated August 11, 1885.

Application filed May 1-2, 1835.

0 all whom it may concern:

Be it known that I, J OHN KOELNER, a citizen of the United States, residing at Terre Haute, in the county of Vigo and State of Indiana, have invented certain new and useful Improvements in Flour-Bolts; and I do hereby declarethe following to bea full, clear, and exact description ofthe invention,such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to flour-bolts used for separating the fine flour from ground wheat or other grain; and it consists in the detailed construction and combination of the parts, hereinafter fully described and clai med, where by the flour is separated from the ground wheat or other grain without the said ground wheat being subjected to any violent action, which in machines as constructed priorto my invention has often caused small particles of bran and other impurities to become mingled with the tlour and impair its whiteness and value.

In carrying out my invention, I provide a series of sieves, which are arranged diagonally within an inclosing framework, one above another, each screen being inclined at an acute angle from a vertical plane, and also at an acute angle with respect to the adjacent screens, substantially as shown. This arangement causes the ground wheat to strike each screen, as it passes through the bolt, at an oblique angle and the impact is not enough to pound oif and detach any impurities or fine bran, but is just enough to cause the fine flour to pass through the screen, anclnothing else. The lower ends of these sieves rest upon springs. The upper ends are provided with knockers held in a frame to which motion is imparted by a revolving-cam. Gather-boards are provided under each sieve for collecting the fine flour.

In the accompanying drawings, Figure I is a side view of the flour-bolt with the side portion of the casing removed. Fig. II is a sectional elevation taken on the line ax in Fig. I. Fig. 111 is a plan View of the machine, looking downwards from above.

(No model.)

Similar letters of reference indicate corresponding parts in all the figures.

A are a series of sieves arranged at acute angles to one another within the casing B. b are guides, which are attached to the casing. These support the ends of the sieves and keep them in a diagonal position, but do not otherwise restrict their movement.

0 are springs, the lower ends of which are firmly secured by screws 0 to the blocks 1), which are attached to the casing B. The upper end of each spring is curved upward and inserted in a groove, a, situated near thebottom of the frame in each sieve, so that each sieve A has its lower end resting upon two of the springs O.

- D are brackets projecting from the top of the casing, and provided with bearings, in which the shaft E is journaled.

F is a camsecured upon the shaft E. f is a belt-pulley, by means of which rotary n10- tion may be communicated to the said shaft.

G is a frame provided with a cross-bar, g, at the top, upon which the projections of the cam strike as the said cam revolves with the shaft. The vertical portions of the frame G extend downward inside the casing B between the guides V, which are attached to the easing for keeping them in position. Knockers g are attached to frame G, which strike against the top of the sieves every time the said frame is allowed to drop.

H are gather-boards arranged under the sieves inside the casing for collecting the fine flour as it passes through the sieves.

The ground wheat is allowed to enter the bolt through the hole 6 in the top of the easin It falls upon each of the sieves in succession. The fine flour passes through the sieves onto the gather-boards, and is collected by them and discharged through the openings Zr at the sides of the bottom of the machine. The coarse particles which will not pass through the sieves are finally discharged through the hole I) in the bottom of the casing. The arflour, and also of the coarse particles. The knockers striking upon the tops of the sieves depress them and cause the ground wheat to fall from one sieve to another. The springs restore the sieves to their original position whenever the knockers are raised by the prorows in Fig. II show the direction of the jections of the cam, which lift the crossbar of the frame to which they are attached.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a flour-bolt, the combination of a series of sieves, A, arranged, substantially as shown, at acute angles with one another, the casing 13, provided with diagonal guides Z) for supporting the sieves, the springs 0, upon which the lower ends of the said sieves rest, and the knockers g, substantially as described and shown, and for the purpose set forth.

2. I11 a fiour-bo1t, the combination of a series of sieves arranged diagonally within it and oppositely inclined with respect to each other, the springs (1, blocks 1), and screws 0, said springs having their lower ends firmly secured by said screws and blocks, and with their upper ends curved upward for the bottom ends of the sieves to rest on, substantially as described and shown, and for the purpose set forth.

3. In a flour-bolt, the combination of the sieves A, the casing B, provided with diagonal guides b and blocks I), the springs G, the cam F, secured upon revolving shaft E, the frame G, provided with eross-bar'g and knockers g, and the gather-boards II, substantially as described and shown, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN KOELNER.

W i t nesscs:

THOMAS H. NnLsoN, OsoiiR L. Giles. 

